PLATE a. 
A. —Four seedlings from surface-sterilized seed, transferred to agar tubes when 
apparently healthy. The plant in tube A was killed by Colktotnchum gossypn, 
the plant in tube W by Fusarium vasinfectum. The other plants were healthy. 
B. —Plant W after living 5 months in pot inoculated with culture D 9. Plant C 
from control pot of the same series. 
(39S) 
25621—23-8 
